[kdepim-users] Filtering on character set in KMail

[Ingo Klöcker]

On Friday 04 December 2009, Steven Friedrich wrote:
> I'm running KDE 4.3.4 on FreeBSD 7.2-RELEASE, though it doesn't
> matter for this question.
>
> I receive quite a bit of SPAM that is not in English.
>
> One tip of the day states that you can filter on Content-type, but I
> don't see that in standard filters.

You can simply type "Content-type" in the field where you can 
select "Subject", "From", "To", etc.


> How can I filter messages that are not in my char set?

You could create a filter checking the "Content-type". The Content-type 
of your message contains "charset=us-ascii". Depending on your settings 
it might also contain "charset=utf-8" (or "charset=utf8"?). Legitimate 
messages you receive may be in many charsets. I think it's better to 
create a blacklist of charsets instead of a whitelist. To do so look at 
the source of some non-English spam and look for "charset=...".

Note that a filter checking the "Content-type" will not work for 
messages with attachments or messages with HTML and normal text part. 
So instead of checking the "Content-type" you might want to check the 
Complete Message for "charset=...".


Regards,
Ingo
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